Graeme:
There is a HUGE difference in the weather one encounters in Florida vs. Northern California. First of all, Florida has oppressive humidity, a condition that is virtually unknown around here. Though it is true that Santa Rosa will get into the high 90's a few times a year, it usually stays in the 70-80's in the summer. Even if it gets into the 90's, a 45 minute to hour drive south to the bay, or west to the coast, will bring that temp. down 15-20 degrees. Many people who visit in July and August complain about the cool weather as it is still often in the 60-70's during those months. September is our warmest month of the year. I used to hate the heat and humidity of the summers,and the cold and snow of the winters where I grew up in New York. Northern California/San Francisco Bay Area weather stays in the middle, rarely approaching either extreme.
Bill, tgo